JPH0526612Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid crystal panel structure. More specifically, the present invention relates to a structure for mounting semiconductor components on a liquid crystal display panel in which a liquid crystal layer is sandwiched between two upper and lower substrates made of glass, resin, or the like.

[Conventional technology]

The structure of a conventional liquid crystal panel was shown in the biweekly magazine "Nikkei Electronics", September 10, 1984, page 211, and was as shown in FIG.

In FIG. 2, 21 is a liquid crystal panel, 22 is a cylindrical linear fluorescent tube, 3 is a light guide plate made of transparent acrylic, 24 is an IC that drives the liquid crystal panel, and 25 is a
Semiconductor parts equipped with IC, 26 is semiconductor part 2
5 shows a bus board that connects the input signal terminal to 5.
Four semiconductor components are laid out in a plane on the outside of the liquid crystal panel 21, and a bus board 26 surrounds the outside of the liquid crystal panel in the shape of a frame to connect the input signal terminals of these semiconductor components.

In addition, other structures of conventional liquid crystal panels are
57-42037, in a matrix type display device, a flexible film substrate is provided along the side of the internal chassis, and it is possible to obtain a highly reliable arrangement of the parts used. It is no longer necessary to fix the flexible film substrate separately from fixing the display panel, etc., and by integrally fixing the display panel and flexible film substrate to the internal chassis, reliability against mechanical stress such as vibrations and drops is improved. This means that it can be significantly improved.

[Problem that the invention attempts to solve]

However, as is clear from FIG. 2, in the prior art described above, in order to brighten the front surface of the image plane of the liquid crystal panel, the cylindrical linear fluorescent tube 22 and the light guide plate 23 are used. The back surface of the liquid crystal panel 21 is illuminated by converting the radial light emitted from the light guide plate 23 into a surface light source, but this light guide plate illuminates the back surface of the liquid crystal panel 21 over an area wider than the area of the image surface of the liquid crystal panel. Since the semiconductor component 25 occupies a space with a certain thickness, it cannot be placed on the back side of the liquid crystal panel 21 and must be placed outside the four sides of the liquid crystal panel 21.
This results in a wide frame around the outer periphery of the image area of the LCD TV, creating an unbalanced design appearance in which the frame of the screen becomes extremely wide despite the thinness of the LCD panel. This made it difficult to downsize the device.

In addition, in the conventional liquid crystal panel structure, the bus board 2
6 has a frame-like shape with a large cut out of the image area of the liquid crystal panel, and there is a lot of waste in terms of materials.
This was disadvantageous in terms of cost.

Furthermore, the structure of a liquid crystal panel shown in Japanese Patent Application Laid-open No. 57-42037 is one in which semiconductor components are arranged in two or four directions, but each of these has the following drawbacks.

First, the disadvantages of arranging semiconductor components in two directions will be explained. When semiconductor components are placed in two directions, one in each of the X and Y directions,
This makes it difficult to mount semiconductor components in the same direction, leading to increased costs. This is because the number of pixels of a liquid crystal display is generally large in the X direction, and video signals are supplied from the This is due to the increase in

Next, when semiconductor components are arranged in four directions, maintenance of the backlight section, such as replacing a U-shaped fluorescent tube, becomes difficult. This is due to the fact that the entire backlight section must be housed inside the bent portion of the member.

Therefore, the present invention aims to reduce costs by facilitating the mounting of semiconductor components, and also to facilitate product maintenance.

[Means for solving problems]

In the liquid crystal panel structure of the present invention, a lead terminal for a light source is arranged on one side of the liquid crystal panel, and a circuit board on which an integrated circuit is mounted is connected to each of the three sides of the liquid crystal panel that do not have lead terminals. , the circuit board connected to the three sides is bent at a right angle or at a greater angle from near the outer periphery of the liquid crystal display panel.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sectional view of an embodiment according to the invention.

FIG. 3 shows a plan view of the embodiment of the invention shown in FIG. 1 and 3, 1 is a liquid crystal panel, 2 is a U-shaped fluorescent tube, 3 is a reflector, 4 is a diffuser plate, 5 is an integrated circuit that drives the liquid crystal panel, 6 is a semiconductor component, and 7 is a semiconductor A bus board connects input signal terminals to the components, and 8 indicates a lead wire of a U-shaped fluorescent tube.

In Figures 1 and 3, the U-shaped fluorescent tube is installed horizontally with the lead wire on the right, the semiconductor components are connected to three sides of the liquid crystal panel, and the U-shaped fluorescent tube is not above the lead wire. The lead wire portion of the U-shaped fluorescent tube requires a certain degree of planar dimension due to the manufacturing process of sealing the fluorescent tube with glass. Even if a semiconductor component is connected to the side of the liquid crystal panel above the lead wire portion of the U-shaped fluorescent tube, this semiconductor component cannot be bent near the side of the panel.

Therefore, as is clear from Figures 1 and 3,
In the liquid crystal panel structure of the present invention, the axial center of the fluorescent tube 2 is located almost at the focal point of the parabolic reflector 3, and the light emitted radially from the U-shaped fluorescent tube 2 is reflected by the parabolic reflector 3. The light is illuminated almost parallel to the back surface of the liquid crystal panel 1. At this time, the planar opening area of the reflecting plate 3 is approximately the same as or slightly larger than the area of the image area of the liquid crystal panel. In the U-shaped fluorescent tube, only the lead wire portion protrudes from the reflecting plate 3. Therefore, the semiconductor parts connected to the sides of the liquid crystal panel can be bent at a right angle or at an angle greater than 100 degrees, except for the top of the lead wire of the U-shaped fluorescent tube, and the liquid crystal panel can be bent at a right angle or more. The frame size can be made extremely small. As a result, the balance between design and appearance is improved, and as a result, it is possible to downsize a liquid crystal TV device with a built-in liquid crystal panel.

In addition, in the liquid crystal panel structure according to the present invention, the bus board that connects the input signal terminals to the semiconductor components is formed below the reflector, and is not extended widely outside the liquid crystal panel, resulting in cost reduction. It is something that can be achieved.

FIG. 4 shows a plan view of another embodiment of the present invention, and the signals in the figure are the same as in FIGS. 1 and 3. In FIG. 4, the U-shaped fluorescent tubes are installed vertically with the lead wires facing down, and the semiconductor components 6 are connected to the four sides of the liquid crystal panel 1. Among the semiconductor components connected to the four sides of the liquid crystal panel, 3 are not located above the lead wire 8 of the U-shaped fluorescent tube.
The semiconductor components on one side are bent near the edge of the LCD panel, but the semiconductor components connected to the other side are bent near the edge of the LCD panel because there is a lead wire for a U-shaped fluorescent tube underneath. It remains flat and undeveloped. Input signal terminal 1 of this semiconductor component that remains flatly developed
0 is connected to the bus board 7, so a connecting component 11 made of FPC is required.

In the embodiment shown in FIG. 4, the semiconductor components on three sides of the semiconductor components connected to each side of the liquid crystal panel are bent near the sides of the liquid crystal panel, so that the semiconductor components in FIGS. As in the example shown, the frame size of the liquid crystal panel can be reduced, and as a result, the design and external appearance of the liquid crystal television device can be improved and the size can be reduced, and the bus board can be made smaller to reduce costs. .

Note that the number of semiconductor components connected per side of the liquid crystal panel is not necessarily one, and the present invention includes slight modifications and improvements without departing from the basic idea of the present invention. Of course.

[Effect of idea]

In the liquid crystal panel structure of the present invention, a lead terminal for a light source is arranged on one side of the liquid crystal panel, and a circuit board on which an integrated circuit is mounted is connected to each of the three sides of the liquid crystal panel that do not have lead terminals. , the circuit board connected to the three sides is bent from the vicinity of the outer periphery of the liquid crystal display panel at a right angle or more, so the frame of the image area of the liquid crystal panel can be made smaller, and the design of the liquid crystal display body can be improved. In addition to achieving a good balance and miniaturization, it also has the effect of reducing the size of the bus board and making it easier to mount semiconductor components, thereby reducing costs, as well as facilitating product maintenance.

[Brief explanation of the drawing]

Figure 1: A cross-sectional view of an embodiment of the liquid crystal panel structure according to the present invention, Figure 2: A cross-sectional view of a conventional liquid crystal panel, Figure 3: A plan view of an embodiment of the liquid crystal panel structure according to the present invention, Figure 4. Figure: A plan view of another embodiment of the liquid crystal panel structure according to the present invention. 1,21...Liquid crystal panel, 2...U-shaped fluorescent tube, 3...Reflector plate, 4,27...Diffusion plate, 5,2
4...Integrated circuit that drives the liquid crystal panel, 6,25
... Semiconductor parts, 7, 26 ... Bus board, 8 ...
Lead wire of U-shaped fluorescent tube, 10... Input signal terminal of semiconductor component, 11... Connecting component, 22... Cylindrical linear fluorescent tube, 23... Light guide plate.

Claims (1)

[Scope of utility model registration request] A light source is arranged on the bottom surface of the liquid crystal display panel, a lead terminal of the light source is arranged on one side of the liquid crystal display panel, and a light source is arranged on each of the three sides of the liquid crystal display panel where the lead terminal of the light source is not arranged. A liquid crystal panel structure characterized in that a circuit board on which an integrated circuit is mounted is connected, and the circuit board connected on three sides is bent from near the outer periphery of the liquid crystal display panel at a right angle or more. .